4.22.1 Crash in FVulkanResourceMultiBuffer::Lock

UE - Rendering Architecture - RHI - Jul 31, 2019

Vulkan Multibuffer Lock mechanism for ReadOnly does not appear to be implemented. Temporary workaround has been provided to licensee. ...

Cinema4D - Material transparency will import with low fidelity to original material

UE - Editor - Content Pipeline - Datasmith - Importer - Jul 29, 2019

Adding Niagara system to a projectile causes a crash

UE - Niagara - Jul 29, 2019

Adding a Niagara system to a BP_Projectile in a C++ First Person Project  and then restarting it causes the editor to crash. Tested in 4.21.2 (CL - 4753647), 4.22.3 (CL - 7053647), 4.23 (CL - 744 ...

Searching for Input or Bindings doesn't show the Action and Axis Mappings Entry Sections

UE - Gameplay - Jul 29, 2019

Searching the Project settings in 4.23 onward for Input/Bindings does not result in the Action and Axis Mappings sections showing up. ...

Virtual Texturing causes crash

UE - Graphics Features - Jul 29, 2019

Virtual streaming a 4K texture and setting the max texture size to 2048 causes the engine to crash. Tested in 4.21.2 (CL - 4753547), 4.22.3 (CL - 7053647), 4.23 (CL - 7445012), 4.24(CL - 7646041) ...

Global illumination Postprocess settings doesn't affect Reflection on Mobile

UE - Platform - Mobile - Jul 29, 2019

Postprocess GI related settings look like working in 4.22 on Mobile now, but seems buggy, Not sure if it has supposed to be supported on Mobile since it has no any info in Doc or 4.22's release note ...

A SoftPathObject as an input parameter referenced by a Blueprint Node didn't cook out

UE - Gameplay - Blueprint Compiler - Jul 27, 2019

The input paramter is a type of UEdGraphPin.  The PinType.PinCategory can be softobject or softclass, and the reference path is saved in a paramter named DefaultValue of UEdGraphPin.The DefaultValue ...

The socketbuilders do not properly join multicast groups on iOS

UE - Networking - Jul 26, 2019

On iOS, using the code in the UDP socketbuilders causes the sessions tool to not join with iOS devices. Giving the error EADDRNOTAVAIL. If the user falls back to the other code function that uses th ...

Crash opening FaceARSample on iOS

UE - Platform - XR - Jul 26, 2019

FaceARSample is crashing as soon as it is opened on iOS. Tested on a iPhoneXS 12.4.  Regression: Yes I was able to get FaceARSample on the same device the previous release 4.22. ...

Regression: Android Media Player Material - Plays on flipped normal

UE - Platform - Mobile - Jul 25, 2019

Media Player Texture/Material is playing on opposite mesh normal. Confirmed on Note 4, Pixel XL and Oculus Quest Did NOT reproduce with Vulkan. Video Material is white on 4.22 and 4.23 iOS ...